# Static backend for the proxy benchmark.
#
# It exists only to answer three fixed bodies faster than either proxy in front
# of it can ask, so that what gets measured is the proxy and not this. The
# Python one it replaces topped out at 243 req/s on a 1 KB body — the 40 ms
# delayed-ACK stall you get from writing headers and body as separate uncorked
# sends — which would have capped both proxies at the same wrong number and
# produced a comparison of nothing.
#
worker_processes 4;
worker_cpu_affinity 0001 0010 0100 1000;  # cores 0-3 = two physical cores; the proxy owns 4-5
error_log /root/bench/out/nginx-error.log crit;
pid /root/bench/out/nginx.pid;
daemon on;

events {
    worker_connections 8192;
    multi_accept on;
}

http {
    access_log off;
    error_log /root/bench/out/nginx-error.log crit;

    # sendfile with tcp_nopush (TCP_CORK) held the last segment of about one
    # 64 KB response in three hundred for the peer's 40 ms delayed-ACK timer:
    # max request time 42 ms, sd 2.4 ms, with nothing in front of nginx at all.
    # Both proxies inherited it on every 64 KB backend fetch, and a fixed stall
    # costs the faster proxy proportionally more. With sendfile off the max is
    # ~2 ms, and every ceiling still sits far above either proxy (2026-09-25).
    sendfile off;
    tcp_nopush off;
    tcp_nodelay on;                 # the thing the Python backend lacked
    # An open()+fstat() per request is real work at 130k req/s, and the three
    # bodies never change. Caching the descriptors removes it from the ceiling
    # this file exists to stay clear of.
    open_file_cache max=16 inactive=1h;
    open_file_cache_valid 1h;
    open_file_cache_min_uses 1;
    open_file_cache_errors off;

    keepalive_timeout 120s;
    keepalive_requests 1000000;

    client_body_temp_path /root/bench/out/nginx-body;
    proxy_temp_path       /root/bench/out/nginx-proxy;
    fastcgi_temp_path     /root/bench/out/nginx-fcgi;
    uwsgi_temp_path       /root/bench/out/nginx-uwsgi;
    scgi_temp_path        /root/bench/out/nginx-scgi;

    server {
        listen 127.0.0.1:18080 backlog=16384 reuseport;
        server_name _;

        default_type application/octet-stream;
        root /srv/bench/www;

        # Served from memory after the first read; no per-request work beyond
        # the send itself.
        location = /empty { alias /srv/bench/www/empty.bin; }
        location = /1k    { alias /srv/bench/www/1k.bin; }
        location = /64k   { alias /srv/bench/www/64k.bin; }
        location = /status { stub_status; }
        location / { return 404; }
    }
}